Finding the Fourth Proportional to 2,819.37, 4,229.61 and 871.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.37 : 4,229.61 = 871.50 : x
2. Step 2: Convert to fraction form
   2,819.37/4,229.61 = 871.50/x
3. Step 3: Cross multiply
   2,819.37x = 4,229.61 × 871.50
4. Step 4: Simplify right side
   2,819.37x = 3,686,105.12
5. Step 5: Solve for x
   x = 3,686,105.12/2,819.37
6. Step 6: Final answer
   x = 1,307.42